Example: Compare Value of Two Dates
// program to compare value of two dates
// create two dates
const d1 = new Date();
const d2 = new Date();
// comparisons
const compare1 = d1 < d2;
console.log(compare1);
const compare2 = d1 > d2;
console.log(compare2);
const compare3 = d1 <= d2;
console.log(compare3);
const compare4 = d1 >= d2;
console.log(compare4);
const compare5 = d1.getTime() === d2.getTime();
console.log(compare5);
const compare6 = d1.getTime() !== d2.getTime();
console.log(compare6);
Output
false false true true true false
In the above example, the new Date() constructor is used to create a date object.
The new Date() gives the current date and time.
const d1 = new Date();
console.log(d1); // Fri Aug 28 2020 09:19:40 GMT+0545 (+0545)
You can then directly compare these two dates using comparison operators >, <, <=, or >=.
However, to use comparison operators like ==, !=, ===, or !==, you have to use date.getTime().
The getTime() method returns the number of milliseconds from midnight of January 1, 1970 (EcmaScript epoch) to the specified date.
const d1 = new Date().getTime();
console.log(d1); // 1598585951699
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